# Check if image has transparency? **URL:** \ **Category:** UXP Plugin API\ **Tags:** api-feedback\ **Created:** [October 7, 2019, 5:11pm UTC](https://forums.creativeclouddeveloper.com/t/check-if-image-has-transparency/1289 "2019-10-07T17:11:42Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Velara](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.creativeclouddeveloper.com/velara/32/1278_2.png) [@Velara](https://forums.creativeclouddeveloper.com/u/Velara)\ **Post date:** [October 7, 2019, 5:11pm UTC](https://forums.creativeclouddeveloper.com/t/check-if-image-has-transparency/1289/1 "2019-10-07T17:11:42Z")
I’m exporting to PNG and I noticed I can reduce the file size if I use JPEG. But JPEG doesn’t support transparency so it’s safer to export to PNG. Is there a way to check if an image has transparency? Does PNG support compression? > **[application · Adobe XD Plugin Reference](https://adobexdplatform.com/plugin-docs/reference/application.html#applicationcreaterenditionsrenditions)** ---
**Author:** ![cpryland](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.creativeclouddeveloper.com/cpryland/32/1172_2.png) [@cpryland](https://forums.creativeclouddeveloper.com/u/cpryland)\ **Post date:** [October 7, 2019, 6:47pm UTC](https://forums.creativeclouddeveloper.com/t/check-if-image-has-transparency/1289/2 "2019-10-07T18:47:29Z")
First google result of “does png support compression”: > **[JPEG vs. PNG: Which compressed image format is better? | Digital Trends](https://www.digitaltrends.com/computing/jpeg-vs-png/)** > > JPEG vs. PNG: Which is better? There are many differences between each format that make each better in certain situations. Learn more to determine what's best. ---
**Author:** ![Velara](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.creativeclouddeveloper.com/velara/32/1278_2.png) [@Velara](https://forums.creativeclouddeveloper.com/u/Velara)\ **Post date:** [October 7, 2019, 7:22pm UTC](https://forums.creativeclouddeveloper.com/t/check-if-image-has-transparency/1289/3 "2019-10-07T19:22:20Z")
Let me rephrase that. Does PNG support a compression quality option during export of renditions in XD? I know it would be lossy. From the [docs](https://adobexdplatform.com/plugin-docs/reference/application.html#applicationcreaterenditionsrenditions) it appears the quality option is only for JPEGs: > **quality** number _(JPG renditions)_ Compression quality in the range [1, 100]. > **background**?Color _(PNG & JPEG renditions)_ Alpha component ignored for JPG. Optional: defaults to transparent for PNG, solid white for JPG. Or does JPEG export type support transparency? There are newer JPEG formats like JPEG XR that say they support transparency. > **Transparency map support** > An [alpha channel](https://en.wikipedia.org/wiki/Alpha_compositing) may be present to represent transparency, so that alpha blending overlay capability is enabled. [JPEG XR - Wikipedia](https://en.wikipedia.org/wiki/JPEG_XR) In my case I was thinking I’ll export JPEG if the image doesn’t have transparency and export PNG if it does. ---
**Author:** ![cpryland](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.creativeclouddeveloper.com/cpryland/32/1172_2.png) [@cpryland](https://forums.creativeclouddeveloper.com/u/cpryland)\ **Post date:** [October 7, 2019, 7:59pm UTC](https://forums.creativeclouddeveloper.com/t/check-if-image-has-transparency/1289/4 "2019-10-07T19:59:18Z")
Given that PNG uses a lossless compression, quality settings don’t apply (in theory). (Though people have worked out hacky compressed versions that still unzip properly, I don’t think that’s part of the standard.) ---
**Author:** ![wzad](https://avatars.discourse-cdn.com/v4/letter/w/e8c25b/32.png) [@wzad](https://forums.creativeclouddeveloper.com/u/wzad)\ **Post date:** [October 11, 2019, 4:21pm UTC](https://forums.creativeclouddeveloper.com/t/check-if-image-has-transparency/1289/5 "2019-10-11T16:21:44Z")
I would guess not. Any png I’ve ever exported from any adobe software Is always much larger In size than Png’s compressed through tools like [https://compresspng.com/](https://compresspng.com/) So I would presume compression on PNG is not something adobe has ever built in ---
**Author:** ![Velara](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.creativeclouddeveloper.com/velara/32/1278_2.png) [@Velara](https://forums.creativeclouddeveloper.com/u/Velara)\ **Post date:** [October 11, 2019, 5:14pm UTC](https://forums.creativeclouddeveloper.com/t/check-if-image-has-transparency/1289/6 "2019-10-11T17:14:49Z")
Interesting… thanks. I used the Image Optimize plugin and it helped some. I’d like to see it add some more options but haven’t followed up on that. In my case I have a large image and want more compression. **[Compresspng.com](http://Compresspng.com)** reduced the size by 66%. _The image was almost too compressed._ **Image Optimizer** reduced the size by 18%. ---
**Author:** ![cpryland](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.creativeclouddeveloper.com/cpryland/32/1172_2.png) [@cpryland](https://forums.creativeclouddeveloper.com/u/cpryland)\ **Post date:** [October 11, 2019, 5:30pm UTC](https://forums.creativeclouddeveloper.com/t/check-if-image-has-transparency/1289/7 "2019-10-11T17:30:35Z")
I assume these compressors compromise quality at higher (non-standard) compression, just like JPEG. ---
**Author:** ![Velara](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.creativeclouddeveloper.com/velara/32/1278_2.png) [@Velara](https://forums.creativeclouddeveloper.com/u/Velara)\ **Post date:** [October 11, 2019, 5:31pm UTC](https://forums.creativeclouddeveloper.com/t/check-if-image-has-transparency/1289/8 "2019-10-11T17:31:20Z")
Yes. I’m looking for the Goldilocks compressed amount.